Cover plate assembly and battery

Abstract

Provided are a cover plate assembly (100) and a battery. The cover plate assembly (100) comprises a cover plate (110) and a monitoring assembly (120). The monitoring assembly (120) comprises an acquisition member (121), a connector (122), and a fixing member (123), wherein the acquisition member (121) is located in an accommodating cavity (210) and is used for obtaining parameter information in a housing (200); the fixing member (123) is mounted on the cover plate (110) and is provided with a second mounting hole (1231) in communication with a first mounting hole (111); one end of the connector (122) passes through the first mounting hole (111) and the second mounting hole (1231) and is electrically connected to the acquisition member (121); and the other end of the connector (122) is exposed to the second mounting hole (1231).

Description

Cover plate assembly and battery

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on June 15, 2023, with application numbers 202321542430.7 and 202310718096.4. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a cover assembly and a battery. Background Art

[0003] Lithium batteries offer advantages such as compact size, high energy density, long lifespan, and environmental friendliness. They are widely used in industries such as automotive, electronics, and energy storage systems. However, during use, lithium batteries generate heat and gas due to charge and discharge cycles. This high level of heat can significantly impact the battery's operation and maintenance, while the generated gas can cause the battery cell to swell. SUMMARY OF THE INVENTION

[0004] Batteries in related technologies cannot monitor internal battery data, such as temperature and pressure, in real time, making it difficult to respond to real-time situations.

[0005] An embodiment of the present application provides a cover assembly mounted on a housing. The housing has a receiving cavity in which a battery cell is mounted. The cover assembly includes:

[0006] A cover plate is mounted on the housing, and a first mounting hole communicating with the receiving cavity is provided on the cover plate;

[0007] Monitoring components, including collection components, connecting components, and fixing components;

[0008] Among them, the collection component is located in the receiving cavity and is used to obtain parameter information in the shell. The fixing component is installed on the cover plate and is provided with a second mounting hole connected to the first mounting hole. One end of the connecting component passes through the first mounting hole and the second mounting hole and is electrically connected to the collection component, and the other end of the connecting component is exposed to the second mounting hole.

[0009] An embodiment of the present application further provides a battery, comprising a shell, a battery cell and the above-mentioned cover assembly, wherein the shell has a receiving cavity, and the battery cell is installed in the receiving cavity. Beneficial effects

[0010] In an embodiment of the present application, a monitoring component is provided so that the collecting component in the monitoring component can collect parameter information in the shell, and send the parameter information collected by the collecting component to an external device through a connecting component in the monitoring component, and the fixing component in the monitoring component can fix the connecting component well to the cover plate, so that the data inside the battery can be monitored in real time, and response measures can be taken according to the real-time situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a schematic structural diagram of a cover plate and a monitoring assembly provided in an embodiment of the present application;

[0012] FIG2 is an exploded schematic diagram of a cover plate and its monitoring assembly provided in an embodiment of the present application;

[0013] FIG3 is an exploded schematic diagram of a monitoring assembly provided in an embodiment of the present application;

[0014] FIG4 is a schematic structural diagram of a cover plate and a monitoring assembly provided in an embodiment of the present application;

[0015] FIG5 is an exploded schematic diagram of a cover plate and its monitoring assembly provided in an embodiment of the present application;

[0016] FIG6 is a schematic structural diagram of a fixing member provided in an embodiment of the present application;

[0017] FIG7 is a cross-sectional view of a fixing member provided in an embodiment of the present application;

[0018] FIG8 is a schematic structural diagram of a cover plate and a monitoring assembly provided in an embodiment of the present application;

[0019] FIG9 is an exploded schematic diagram of a cover plate and its monitoring assembly provided in an embodiment of the present application;

[0020] FIG10 is an exploded schematic diagram of a monitoring assembly provided in an embodiment of the present application;

[0021] FIG11 is a schematic structural diagram of a housing and a battery cell provided in an embodiment of the present application.

[0022] FIG12 is a perspective view of a battery provided in an embodiment of the present application.

[0023] FIG13 is an exploded schematic diagram of the cover assembly provided in an embodiment of the present application.

[0024] FIG14 is a bottom view of the cover assembly provided in an embodiment of the present application.

[0025] FIG15 is a schematic structural diagram of a signal acquisition device of a cover assembly provided in an embodiment of the present application.

[0026] FIG16 is a schematic diagram of a partial cross-sectional structure of a signal acquisition device of a cover assembly provided in an embodiment of the present application.

[0027] FIG17 is a schematic diagram of the internal structure of the signal acquisition device of the cover assembly provided in an embodiment of the present application.

[0028] FIG18 is a schematic diagram of a partial cross-sectional structure of a battery provided in an embodiment of the present application.

[0029] FIG19 is a partial enlarged view of point A in FIG18 .

[0030] FIG20 is an exploded schematic diagram of the connecting member and the fixing member in FIG18 .

[0031] FIG21 is a schematic partial cross-sectional view of a battery provided in an embodiment of the present application.

[0032] Figure 22 is a schematic structural diagram of the second protective film side in the battery provided in an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 100, cover assembly; 200, housing; 210, receiving cavity; 300, battery cell; 110, cover; 111, first mounting hole; 112, second sinking portion; 113, second sealing member; 114, first opening; 115, second sealing member; 116, second opening; 117, third sealing member; 118, fourth sealing member; 119, third mounting hole; 120, monitoring assembly; 121, collection member; 1211, temperature collection member; 1212, stress collection member; 1213, gas composition collection member; 122, connector; 1221, base; 1222, first connecting portion; 1223, second connecting portion; 1224, first protrusion; 1225, first sealing member; 1226, sub-connector; 12 27. Second protrusion; 123. Fixing piece; 1231. Second mounting hole; 1232. First fixing part; 1233. Second fixing part; 1234. Transition part; 124. Signal acquisition device; 1241. Main body; 1242. Accommodation space; 1243. Data processor; 1244. Connecting line; 1245. Power supply; 1246. Air pressure sensor; 1247. Vent; 1248. Breathable membrane; 125. Wireless transmitting module; 126. First protective film; 127. Second protective film; 1271. Hollow area; 130. Lower plastic; 131. Fourth mounting hole; 132. First sinking part; 140. Pole; 150. Connecting piece; 151. Notch; 160. Filling hole; 170. Explosion-proof valve. Modes for Carrying Out the Invention

[0035] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0037] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0038] As shown in FIG. 1 , FIG. 2 , and FIG. 10 , an embodiment of the present application provides a cover plate assembly 100 , which is installed on a housing 200 . The cover plate assembly 100 includes a cover plate 110 and a monitoring assembly 120 .

[0039] The housing 200 has a receiving cavity 210 for accommodating the battery cell 300. The battery cell 300 is fixedly mounted within the receiving cavity 210. An opening is provided on one side of the housing 200, communicating with the receiving cavity 210. A cover plate 110 is mounted on the housing 200. Specifically, the cover plate 110 covers the side of the housing 200 where the opening is provided. A first mounting hole 111 is provided on the cover plate 110, communicating with the receiving cavity 210.

[0040] The monitoring component 120 includes a collecting component 121, a connecting component 122 and a fixing component 123. The collecting component 121 is located in the receiving cavity 210, and the collecting component 121 is used to obtain parameter information in the shell 200. The parameter information includes the temperature of the battery cell 300, the pressure in the shell 200 and the gas composition in the shell 200. Among them, the pressure refers to the pressure of the gas in the shell 200 on the shell 200. The fixing component 123 is installed on the cover plate 110 and is provided with a second mounting hole 1231 connected to the first mounting hole 111. The connecting component 122 passes through the first mounting hole 111 and the second mounting hole 1231. One end of the connecting component 122 is electrically connected to the collecting component 121, and the other end of the connecting component 122 is exposed to the second mounting hole 1231 to transmit the parameter information collected by the collecting component 121 to the external device.

[0041] In this application, by setting up a monitoring component 120, the collecting component 121 in the monitoring component 120 can collect parameter information in the shell 200, and send the parameter information collected by the collecting component 121 to an external device through the connecting component 122 in the monitoring component 120, and the fixing component 123 in the monitoring component 120 can fix the connecting component 122 well to the cover plate 110, so that the data inside the battery can be monitored in real time, and then response measures can be taken according to the real-time situation.

[0042] As shown in Figures 1, 2, and 11, in one embodiment, a cover plate assembly 100 is installed on a shell 200, and the cover plate assembly 100 includes a cover plate 110 and a monitoring assembly 120. The shell 200 has a receiving cavity 210, and the battery cell 300 is fixedly arranged in the receiving cavity 210. An opening connected to the receiving cavity 210 is provided on one side of the shell 200. The cover plate 110 is covered on the side of the shell 200 where the opening is provided. A first mounting hole 111 connected to the receiving cavity 210 is provided on the cover plate 110. The battery cell 300 is installed in the shell 200. Two battery cells 300 can be installed in the shell 200, and the two battery cells 300 are arranged side by side.

[0043] The monitoring assembly 120 includes a sensor 121, a connector 122, and a fixture 123. The sensor 121 is located within the housing 210 and is used to acquire parameter information within the housing 200. This parameter information includes the temperature of the battery cell 300 and the pressure within the housing 200. The sensor 121 includes multiple sensors and multiple connecting wires 1244, including at least a temperature sensor and a pressure sensor. The connecting wires 1244 connect the sensors to the sensor 122. The fixture 123 is mounted on the cover 110 and has a second mounting hole 1231 that connects to the first mounting hole 111. The connector 122 passes through the first mounting hole 111 and the second mounting hole 1231. One end of the connector 122 is electrically connected to the sensor 121 (connecting wire), while the other end of the connector 122 is exposed through the second mounting hole 1231 to transmit the parameter information collected by the sensor 121 to external devices. In some embodiments, the sensor is attached to the battery cell 300.

[0044] As shown in Figure 3, the connecting member 122 includes a base portion 1221, a first connecting portion 1222 and a second connecting portion 1223. The base portion 1221 is located in the second mounting hole 1231. The first connecting portion 1222 is connected to the end of the base portion 1221 that is away from the battery cell 300, and the first connecting portion 1222 is exposed to the second mounting hole 1231. The second connecting portion 1223 is connected to the other end of the base portion 1221 that is close to the battery cell 300, and the second connecting portion 1223 extends into the first mounting hole 111. The second connecting portion 1223 is used to electrically connect the connecting line 1244 and the first connecting portion 1222. The first connecting portion 1222 is used to connect to an external device, that is, as a connecting terminal to transmit the information collected by the collection member 121 to the external device.

[0045] In some embodiments, a connecting channel is provided in the base portion 1221, one end of the second connecting portion 1223 extends into the first mounting hole 111 and is connected to the collecting member 121, and the other end of the second connecting portion 1223 is connected to the first connecting portion 1222 in the connecting channel, and one end of the first connecting portion 1222 is exposed to the second mounting hole 1231 to facilitate connection with external equipment.

[0046] In some embodiments, the connector 122 may transmit information wirelessly in addition to the aforementioned wired connection. For example, a wireless signal module may be provided within the first connector 1222 to transmit parameter information to an external device wirelessly. The wireless module may include a radio frequency chip.

[0047] In some embodiments, a first protrusion 1224 is provided on the outer side of the base portion 1221, and the connector 122 includes a first sealing member 1225. The fixing member 123 includes a first fixing portion 1232, a second fixing portion 1233, and a transition portion 1234. The first fixing portion 1232 is arranged around the base portion 1221 and is located on the side of the first protrusion 1224 facing away from the cover plate 110. The first fixing portion 1232 is provided with a second mounting hole 1231. The second fixing portion 1233 is arranged around the base portion 1221 and connected to the cover plate 110. The transition portion 1234 is connected between the outer periphery of the first fixing portion 1232 and the inner periphery of the second fixing portion 1233. The transition portion 1234 has a through hole connected to the second mounting hole 1231.

[0048] The first sealing member 1225 is sleeved on the outside of the base portion 1221 and connected between the first protrusion 1224 and the fixing member 123. Specifically, the first sealing member 1225 fills the through-hole, the space between the first protrusion 1224 and the cover plate 110, and the space between the first protrusion 1224 and the first fixing portion 1232, the second fixing portion 1233, and the transition portion 1234. Because the first sealing member 1225 fills the spaces between these components, it provides a good insulating and sealing effect.

[0049] In some embodiments, the first seal 1225 is integrally formed by injection molding and is also applied to the outer surfaces of the first fixing portion 1232, a portion of the second fixing portion 1233, and the transition portion 1234 to protect the portions of these components where the first seal 1225 is applied from corrosion. In other embodiments, the entire outer surface of the second fixing portion 1233 is applied with the first seal 1225, that is, the outer surface of the weld between the second fixing portion 1233 and the cover plate 110 is also provided with the first seal 1225. Thus, the entire outer surface of the fixing portion 1233 is protected by the first seal 1225.

[0050] In some embodiments, the cover plate 110 is provided with a second sunken portion 112, which is arranged around the perimeter of the first mounting hole 111. The second fixing portion 1233 is located within the second sunken portion 112 and welded to the cover plate 110. In some embodiments, the sidewalls of the second fixing portion 1233 abut against the sidewalls of the second sunken portion 112, so that the second sunken portion 112 limits the second fixing portion 1233. This further strengthens the horizontal fixation between the second fixing portion 1233 and the cover plate 110 while the second fixing portion 1233 is welded to the cover plate 110. In some embodiments, the second fixing portion 1233 is located within the second sunken portion 112, and the top surface of the second fixing portion 1233 is flush with the top surface of the second sunken portion 112, thereby improving the smoothness of the connection between the cover plate 110 and the second fixing portion 1233.

[0051] In some embodiments, the housing 200 is further provided with a post 140, a liquid injection hole 160, and an explosion-proof valve 170. The cover assembly further includes a lower plastic 130, which is provided on a side of the cover 110 away from the first connection portion 1222. The lower plastic 130 is provided with a plurality of fourth mounting holes 131 corresponding to the post 140 and the first mounting hole 111.

[0052] In some embodiments, the first sealing member 1225, the first fixing portion 1232, a portion of the second fixing portion 1233, the transition portion 1234, and the fixing member 123 are integrally injection molded. Specifically, the aforementioned components (except the first sealing member 1225) are assembled and placed in an injection mold. Molding material is then injected into the mold, and the molding material solidifies to form the first sealing member 1225 that secures the aforementioned structure. The integral injection molding of the first sealing member 1225, the first fixing portion 1232, a portion of the second fixing portion 1233, the transition portion 1234, and the fixing member 123 allows the aforementioned structure to be pre-assembled and then mounted to the cover plate 110, thereby speeding up installation.

[0053] As shown in Figures 4, 5, 6, 7, and 11, in one embodiment, a cover plate assembly 100 is mounted on a housing 200. The cover plate assembly 100 includes a cover plate 110 and a monitoring assembly 120. The housing 200 has a receiving cavity 210, and the battery cell 300 is fixedly disposed within the receiving cavity 210. An opening is provided on one side of the housing 200, communicating with the receiving cavity 210. The cover plate 110 is disposed on the side of the housing 200 provided with the opening. The cover plate 110 has a first mounting hole 111 provided on the cover plate 110, communicating with the receiving cavity 210.

[0054] The monitoring assembly 120 includes a collection member 121, a connector 122, and a fixing member 123. The collection member 121 is located within the receiving cavity 210 and is used to acquire parameter information within the housing 200. This parameter information includes the temperature of the battery cell 300 and the pressure within the housing 200. The collection member 121 includes multiple sensors, including at least a temperature sensor and a pressure sensor, and multiple connecting wires 1244, which connect the sensors to the connector 122. The fixing member 123 is mounted on the cover 110 and has a second mounting hole 1231 that connects to the first mounting hole 111. The connector 122 passes through the first mounting hole 111 and the second mounting hole 1231. One end of the connector 122 is electrically connected to the collection member 121, while the other end of the connector 122 is exposed in the second mounting hole 1231 to transmit the parameter information collected by the collection member 121 to an external device. In some embodiments, the sensors are attached to the battery cell 300.

[0055] The connector 122 includes multiple mutually insulated sub-connectors 1226. The cover 110 is provided with multiple first mounting holes 111 corresponding to the sub-connectors 1226, and the fixing member 123 is provided with multiple second mounting holes 1231 corresponding to the sub-connectors 1226. One end of each sub-connector 1226, facing away from the acquisition member 121, is exposed in the corresponding second mounting hole 1231. The other end of each sub-connector 1226 extends into the corresponding first mounting hole 111 and is electrically connected to the connecting wire 1244. Each sub-connector 1226 is insulated from each other, allowing it to transmit different signals. This allows the connector 122 to simultaneously transmit multiple different signals without interference.

[0056] In some embodiments, the cover plate 110 is provided with a second sunken portion 112, which is arranged around the first mounting hole 111. The fixing member 123 includes a first fixing portion 1232 and a second fixing portion 1233. The first fixing portion 1232 is provided with a plurality of second mounting holes 1231. The second fixing portion 1233 is arranged around the first fixing portion 1232 and is located within the second sunken portion 112. The outer periphery of the second fixing portion 1233 extends to be welded to the cover plate 110.

[0057] In some embodiments, the cover assembly 100 further includes a second seal 115 and a third seal 117. The second seal 115 is positioned between the first fixing portion 1232 and the plurality of sub-connectors 1226. The second seal 115 is provided with a plurality of first protrusions 1224, each of which defines a plurality of first openings 114 communicating with the second mounting holes 1231. Each first protrusion 1224 is mounted within the plurality of second mounting holes 1231. One end of the sub-connector 1226 is positioned within the first opening 114 and exposed to the corresponding first opening 114, thereby insulating the sub-connector 1226 from the fixing portion 123. The second seal 115 is positioned between the plurality of sub-connectors 1226 and the cover 110. The third seal 117 is provided with a plurality of second bosses, each of which defines a plurality of second openings 116. Each second boss is mounted within the plurality of first mounting holes 111. The other end of the sub-connector 1226 is disposed in the second opening 116 and electrically connected to the collecting member 121, thereby insulating the sub-connector 1226 from the cover 110. This arrangement insulates the connector 122 from the fixing member 123 and the cover 110.

[0058] In some embodiments, a second protrusion 1227 is provided on the outer side of the sub-connector 1226, and the second protrusion 1227 is located between the second sealing member 115 and the third sealing member 117. Specifically, the second sealing member 115 is provided with a plurality of receiving grooves, each of which is arranged around the perimeter of a first opening 114. The second protrusion 1227 of each sub-connector 1226 is located in a corresponding receiving groove, and the second protrusion 1227 is abutted and insulated against the first fixing portion 1232 through the second sealing member 115.

[0059] In some embodiments, the second protrusion 1227 is larger than the diameter of the second opening 116 so as to be constrained by the third sealing member 117. With the above configuration, the third sealing member 117 can be stably constrained between the second sealing member 115 and the third sealing member 117.

[0060] In some embodiments, the housing 200 is further provided with a terminal post 140, a liquid injection port 160, and an explosion-proof valve 170. The battery further includes a lower plastic member 130, which is disposed on a side of the cover 110 facing away from the fixing member 123. The lower plastic member 130 is provided with a plurality of fourth mounting holes 131 corresponding to the terminal post 140 and the first mounting hole 111.

[0061] In some embodiments, the sub-connector 1226 includes a connector, which includes but is not limited to a metal plug-in, such as a metal pin.

[0062] As shown in Figures 8, 9, 10, and 11, in one embodiment, a cover plate assembly 100 is mounted on a housing 200. The cover plate assembly 100 includes a cover plate 110 and a monitoring assembly 120. The housing 200 has a receiving cavity 210, and the battery cell 300 is fixedly disposed within the receiving cavity 210. An opening is provided on one side of the housing 200, communicating with the receiving cavity 210. The cover plate 110 is disposed on the side of the housing 200 with the opening. The cover plate 110 has a first mounting hole 111 provided on the cover plate 110, communicating with the receiving cavity 210.

[0063] The monitoring assembly 120 includes a collection member 121, a connector 122, and a fixing member 123. The collection member 121 is located within the receiving cavity 210 and is used to acquire parameter information within the housing 200. This parameter information includes the temperature of the battery cell 300 and the pressure within the housing 200. The collection member 121 includes multiple sensors and multiple connecting wires 1244, including at least a temperature sensor and a pressure sensor. The multiple connecting wires 1244 are used to connect the sensors to the connector 122. The fixing member 123 is mounted on the cover 110 and has a second mounting hole 1231 that connects to the first mounting hole 111. The connector 122 passes through the first mounting hole 111 and the second mounting hole 1231. One end of the connector 122 is electrically connected to the collection member 121, while the other end of the connector 122 is exposed in the second mounting hole 1231 to transmit the parameter information collected by the collection member 121 to an external device. In some embodiments, the sensors are attached to the battery cell 300.

[0064] The diameter of first mounting hole 111 gradually decreases from cover plate 110 toward collection member 121. The battery also includes a fourth sealing member 118 positioned within first mounting hole 111. The shape of fourth sealing member 118 corresponds to that of first mounting hole 111, and fourth sealing member 118 is in contact with the wall of first mounting hole 111. Fourth sealing member 118 is provided with a third mounting hole 119 and is elastic. Therefore, after connector 122 is positioned within fourth sealing member 118, first sealing member 1225 can compress it, ensuring good stability and sealing.

[0065] The cover plate 110 is provided with a second sunken portion 112 which surrounds the perimeter of the first mounting hole 111 . The fixing member 123 is located in the second sunken portion 112 and covers the sealing member. The outer periphery of the fixing member 123 is connected to the cover plate 110 .

[0066] In some embodiments, the cover assembly also includes a lower plastic 130, the lower plastic 130 is provided with a fourth mounting hole 131, and a first sinking portion 132 is provided on the hole wall of the fourth mounting hole 131. Part of the cover 110 is located in the first sinking portion 132 to prevent relative displacement between the cover 110 and the first sinking portion 132, and the connecting member 122 passes through the fourth mounting hole 131 and is electrically connected to the connecting line 1244.

[0067] In some embodiments, as shown in Figures 11, 13, 18, and 19, the cover plate assembly 100 is located on top of the battery cell 300 and is connected to the battery cell 300. The monitoring assembly 120 also includes a signal acquisition device 124, which is disposed on the side of the cover plate 110 facing the battery cell 300 and is connected to the acquisition member 121 and the connector 122.

[0068] In this embodiment, signal acquisition device 124 is integrally assembled with cover plate 110 via connector 122 and fixing member 123. Cover plate assembly 100 is easily installed and removed as a whole. Signal acquisition device 124 is isolated from the electrolyte within the battery, protecting it and improving its reliability.

[0069] In some embodiments, as shown in Figures 15, 16, and 17, the signal acquisition device 124 includes a body 1241 and a data processor 1243. The body 1241 is a cubic structure, and a receiving space 1242 is defined therein. The receiving space 1242 can be a cubic structure or a T-shaped space. The data processor 1243 is disposed within the receiving space 1242 and is connected to the acquisition unit 121 via a connecting line 1244. The data processor 1243 is configured to convert the signals collected by the acquisition unit 121 into electrical signals.

[0070] In some embodiments, as shown in FIG17 , the signal acquisition device 124 further includes a power supply 1245 , which is electrically connected to the data processor 1243 . The power supply 1245 may be a primary lithium battery. The power supply 1245 is disposed within the receiving space 1242 , electrically connected to the data processor 1243 , and provides power to the data processor 1243 .

[0071] In the embodiment of the present application, as shown in Figures 16 and 17, the signal acquisition device 124 includes a body 1241, a data processor 1243, and a power supply 1245. The data processor 1243 and the power supply 1245 are integrated into the body 1241. The signal acquisition device 124 has a simple structure and good integration, and is easy to assemble with the cover assembly 100.

[0072] In other embodiments, the data processor 1243 is electrically connected to the positive and negative electrodes of the battery. The battery powers the data processor 1243, eliminating the need for an additional power supply 1245, thereby reducing equipment investment and costs.

[0073] In some embodiments, the receiving space 1242 is filled with sealant. The body 1241 is provided with a sealant injection hole, through which the sealant is injected into the receiving space 1242. The volume of the sealant accounts for 70% to 99% of the volume of the receiving space 1242.

[0074] In the embodiment of the present application, by filling the receiving space 1242 with sealant, the electronic components in the receiving space 1242 are immersed in the sealant, thereby reducing the probability of electrolyte erosion of the electronic components and improving the sealing of the signal acquisition device 124.

[0075] In some embodiments, as shown in Figures 15 and 16, the signal acquisition device 124 also includes an air pressure sensor 1246. The air pressure sensor 1246 is arranged in the receiving space 1242. The air pressure sensor 1246 is connected to the data processor 1243. The air pressure sensor 1246 is configured to detect the air pressure value in the battery.

[0076] In the embodiment of the present application, an air pressure sensor 1246 is added to the signal acquisition device 124. The air pressure sensor 1246 monitors the air pressure in the battery in real time and provides comprehensive monitoring.

[0077] In some embodiments, as shown in FIG16 , a vent 1247 and a breathable membrane 1248 are provided on the main body 1241. A vent 1247 is provided on the side wall of the main body 1241 close to the battery explosion-proof valve 170. The shape of the vent 1247 can be circular or square. The breathable membrane 1248 is connected to the main body 1241, and the breathable membrane 1248 blocks the vent 1247. The breathable membrane 1248 is breathable and isolates the electrolyte. The air pressure sensor 1246 is disposed in the receiving space 1242, and the air pressure sensor 1246 is disposed opposite to the vent 1247. The air pressure sensor 1246 is configured to detect the air pressure value in the battery.

[0078] In the embodiment of the present application, the breathable membrane 1248 can isolate the electrolyte to prevent the electrolyte from entering the signal acquisition device 124 , while also allowing gas to enter the air pressure sensor 1246 through the breathable membrane 1248 to ensure the monitoring effect of the air pressure sensor 1246 .

[0079] In some embodiments, a snap-fit ​​member is provided on the body 1241, and a snap-fit ​​member is provided on the cover 110, and the snap-fit ​​member and the snap-fit ​​member are snap-fitted together. The snap-fit ​​member may be a snap-fit ​​slot, and the snap-fit ​​member may be a snap. The snap-fit ​​slot and the snap-fit ​​slot cooperate to achieve a detachable connection between the cover 110 and the signal acquisition device 124, facilitating easy installation and removal of the signal acquisition device 124.

[0080] In other embodiments, the body 1241 is a plastic body 1241, and the plastic body 1241 and the cover 110 are fixedly connected by hot-melt at the joint position. Alternatively, the body 1241 and the cover 110 can be fixed by welding or gluing.

[0081] In some embodiments, as shown in Figures 18, 19, and 20, the monitoring component 120 further includes a wireless transmitter module 125, which is connected to the signal acquisition device 124. The wireless transmitter module 125 is connected to the signal acquisition device 124 via a connector 122 and a fixture 123.

[0082] In this embodiment of the present application, the signal acquisition device 124 converts the collected signals into electrical signals, which are then transmitted via the wireless transmission module 125. Wireless transmission reduces wiring and simplifies installation and operation. The power supply 1245 also provides power to the wireless transmission module 125, eliminating the need for a separate power supply module, facilitating component integration and saving space.

[0083] In other embodiments, the signal acquisition device 124 is connected to the external battery control system via wired transmission, which has good stability.

[0084] In some embodiments, as shown in FIG. 13 and FIG. 14 , the cover plate assembly 100 further includes a pole 140 and a connecting piece 150 .

[0085] In this embodiment, the cover plate 110 is a rectangular plate structure, and the material of the cover plate 110 can be plastic. The cover plate 110 is provided with a through hole for the pole 140 to pass through. The cover plate 110 is also installed with an explosion-proof valve 170.

[0086] In this embodiment, the poles 140 include a positive pole and a negative pole, and the positive pole and the negative pole are mounted on the cover plate 110 .

[0087] In this embodiment, a connecting piece 150 is disposed on the side of the cover plate 110 facing the battery cell 300. The connecting piece 150 connects the terminal post 140 to the tab of the battery cell 300. A notch 151 is defined on the side of the connecting piece 150 near the signal acquisition device 124, and the signal acquisition device 124 is partially located within the notch 151.

[0088] In the embodiment of the present application, in order to reasonably utilize the limited space of the cover plate 110, a notch 151 is provided in the connecting piece 150 to avoid interference between the connecting piece 150 and the signal acquisition device 124, resulting in a compact structure and a reasonable spatial layout.

[0089] In some embodiments, as shown in FIG. 14 , the notch 151 is flared, and the opening size of the notch 151 at one end close to the signal acquisition device 124 is larger than the opening size at the other end.

[0090] In some embodiments, as shown in FIG14 , the sidewalls of the notch 151 on the connecting piece 150 have an inclination angle a, where 3°≤a≤30°. The connecting piece 150330 is in a horizontal "H" shape. The value of a can be 3°, 5°, 8°, 10°, 15°, 18°, 22°, 27°, or 30°.

[0091] In the embodiment of the present application, the notch 151 is flared, and the inclination angle of the side wall of the notch 151 on the connecting piece 150 ensures the structural strength of the connecting piece 150 while meeting the installation space of the signal acquisition device 124.

[0092] As shown in FIG11 , an embodiment of the present application further provides a battery, comprising a shell 200 , a battery cell 300 and the cover assembly 100 of any one of the above embodiments, wherein the shell 200 has a receiving cavity 210 , and the battery cell 300 is installed in the receiving cavity 210 .

[0093] In some embodiments, the connector 122 includes but is not limited to a circuit board, such as a flexible circuit board, and the connecting wire 1244 is soldered to a pad of the circuit board.

[0094] In some embodiments, as shown in Figures 18, 21, and 22, the monitoring assembly 120 includes a first protective film 126. The first protective film 126 is disposed on one side of the battery cell 300, with one side of the first protective film 126 in contact with a side of the battery cell 300. A collection element 121 is secured to the side of the first protective film 126 facing away from the battery cell 300. The collection element 121 is configured to collect parameter information within the battery. This parameter information may include at least one of temperature information, stress information, and gas composition information.

[0095] In the embodiment of the present application, the battery cell 300 is separated from the collecting member 121 by a first protective film 126. This reduces the probability of the collecting member 121 piercing the separator of the battery cell 300, protects the cell, and improves the reliability of the battery cell 300.

[0096] In some embodiments, as shown in FIG22 , the monitoring assembly 120 further includes a second protective film 127 . The first protective film 126 and the second protective film 127 can be disposed between two battery cells 300 . The first protective film 126 is bonded to the side of one of the battery cells 300 , and the second protective film 127 is bonded to the side of the other battery cell 300 . The second protective film 127 is bonded to the first protective film 126 . The first and second protective films 126 , 127 are bonded together by adhesive. Multiple collection pieces 121 are disposed between the first and second protective films 126 , 127 . The collection pieces 121 are secured by the first and second protective films 126 , 127 .

[0097] In the embodiment of the present application, the collection member 121 is fixed between the first protective film 126 and the second protective film 127, and the collection member 121 is easy to install and fix. The collection member 121 can be assembled with the first protective film 126 and the second protective film 127 and then installed in the battery, which is simple to install. The collection member 121 is separated from the battery cells 300 on both sides by the first protective film 126 or the second protective film 127, reducing the probability of the collection member 121 piercing the separator of the battery cell 300, protecting the battery cell 300, and improving the reliability of the battery cell 300.

[0098] In some embodiments, the acquisition component 121 includes at least one of a temperature acquisition component 1211, a stress acquisition component 1212, and a gas composition acquisition component 1213. The temperature acquisition component 1211 is configured to acquire temperature parameters within the battery. The stress acquisition component 1212 is configured to acquire stress parameters within the battery. The gas composition acquisition component 1213 is configured to acquire gas composition parameters within the battery. The type and number of acquisition components 121 can be set as needed and are not specifically limited in this embodiment. The number of temperature acquisition components 1211, stress acquisition components 1212, and gas composition acquisition components 1213 can be one or more.

[0099] In the embodiment of the present application, as shown in FIG21 , the acquisition component 121 includes at least one of a temperature acquisition component 1211, a stress acquisition component 1212, and a gas composition acquisition component 1213. The diverse types of acquisition components 121 allow for comprehensive monitoring within the battery, thereby improving battery safety.

[0100] In some embodiments, as shown in Figure 21 , multiple collection elements 121 are positioned near the center of the first protective film 126. For example, a temperature collection element 1211, a stress collection element 1212, and a gas composition collection element 1213 are each positioned near the center of the first protective film 126. In other embodiments, multiple collection elements 121 may also be positioned near the edges of the battery cell 300 as needed.

[0101] In the embodiment of the present application, the collecting element 121 is set in the area near the middle of the first protective film 126, that is, multiple collecting elements 121 collect parameter information near the middle area in the battery, and the data collection result is accurate.

[0102] In some embodiments, as shown in Figure 21, the collection component 121 includes a temperature collection component 1211, a stress collection component 1212 and a gas composition collection component 1213. Along the width direction of the first protective film 126, the temperature collection component 1211 and the stress collection component 1212 are arranged at intervals, and along the length direction of the first protective film 126, the temperature collection component 1211 and the gas composition collection component 1213 are arranged at intervals.

[0103] In the embodiment of the present application, the temperature collection component 1211, the stress collection component 1212 and the gas composition collection component 1213 are arranged at intervals. The temperature collection component 1211 and the stress collection component 1212 are located on the same side, and the gas composition collection component 1213 is located on the other side. The arrangement of multiple collection components 121 is reasonable and convenient for the routing of each collection component 121.

[0104] In some embodiments, as shown in FIG22 , the plurality of collection elements 121 include a gas component collection element 1213, and the second protective film 127 has a hollowed-out area 1271. The second protective film 127 within the hollowed-out area 1271 is removed, and the collection end of the gas component collection element 1213 is located within the hollowed-out area 1271. The collection end of the gas component collection element 1213 is exposed to the air, allowing for full contact with the gas within the battery, thereby collecting the gas composition within the battery and ensuring accurate collection results.

[0105] In some embodiments, the first protective film 126 and / or the second protective film 127 include a polypropylene (PP) film or a polyimide (PI) film. The first protective film 126 and the second protective film 127 may be made of the same material, such as a PP film or a PI film. Alternatively, the first protective film 126 and the second protective film 127 may be made of different materials, such as a PP film and a PI film.

[0106] In the embodiment of the present application, the first protective film 126 and the second protective film 127 are PP film layers or PI film layers, which have the characteristics of good insulation and corrosion resistance.

[0107] In some embodiments, the length dimension of the first protection film 126 is the same as the length dimension of the second protection film 127 .

[0108] In some embodiments, the width dimension of the first protection film 126 is the same as the width dimension of the second protection film 127 .

[0109] In some embodiments, the thickness of the first protection film 126 is the same as the thickness of the second protection film 127 .

[0110] In the embodiment of the present application, the first protective film 126 and the second protective film 127 have the same size, and the projection of the second protective film 127 on the plane of the first protective film 126 overlaps with the first protective film 126. The first protective film 126 and the second protective film 127 are easy to cut and process, and the first protective film 126 and the second protective film are aligned, which facilitates the simple gluing operation.

[0111] In some embodiments, the length of the first protective film 126 or the length of the second protective film 127 is less than or equal to the length of the battery cell 300 .

[0112] In some embodiments, the width of the first protection film 126 or the width of the second protection film 127 is less than or equal to the width of the battery cell 300 .

[0113] In the embodiment of the present application, the size of the first protective film 126 or the size of the second protective film 127 is smaller than or equal to the size of the side of the battery cell 300 to prevent the first protective film 126 or the second protective film 127 from extending to the area outside the battery cell 300.

[0114] In some embodiments, the sum of the thicknesses of the first protective film 126 and the second protective film 127 is D, where 0.1 mm ≤ D ≤ 2.0 mm. The value of D can be 0.1 mm, 0.3 mm, 0.6 mm, 0.7 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2.0 mm, or other values ​​specified.

[0115] In the embodiment of the present application, the sum of the thicknesses of the first protective film 126 and the second protective film 127 is relatively small, and the space occupied by the battery is relatively small. The addition of the first protective film 126 and the second protective film 127 does not increase the specifications of the battery.

[0116] In some embodiments, referring to FIG. 21 , the distance between the wide side of the first protective film 126 or the second protective film 127 and the wide side of the battery cell 300 is W. The distance between the long side of the first protective film 126 or the second protective film 127 and the long side of the battery cell 300 is L. Here, 3.0 mm ≤ W ≤ 30.0 mm, and 3.0 mm ≤ L ≤ 30.0 mm. The values ​​of W or L can be 3.1 mm, 4.3 mm, 5.6 mm, 6.7 mm, 7.0 mm, 8.2 mm, 9.5 mm, 10.7 mm, 11.9 mm, 12.0 mm, 14.0 mm, 15.0 mm, 16.5 mm, 17.8 mm, 19.0 mm, 20.0 mm, 21.2 mm, 23.0 mm, 24.5 mm, 26.0 mm, 28.0 mm, 29.0 mm, 30.0 mm, or other values ​​specified. The values ​​of W and L can be the same or different.

[0117] In the embodiment of the present application, the distance between the edge of the first protective film 126 or the second protective film 127 and the edge of the battery cell 300 is small, and the area of ​​the first protective film 126 and the second protective film 127 is large. This allows for a wide range of installation areas for the collection member 121, facilitating installation of the collection member 121 and ensuring the accuracy of the monitoring results.

[0118] In some embodiments, the first protective film 126 and / or the second protective film 127 has a first end and a second end. The first end is close to the top of the battery cell 300, and the second end is close to the bottom of the battery cell 300. The distance between the first end and the top of the battery cell 300 is smaller than the distance between the second end and the bottom of the battery cell 300.

[0119] In the embodiment of the present application, the signal acquisition device 124 is located at the top of the battery cell 300, and the acquisition member 121 is connected to the signal acquisition device 124 via a connecting wire 1244. By setting the distance between the first end and the top of the battery cell 300 to be smaller than the distance between the second end and the bottom of the battery cell 300, the overlapping area of ​​the connecting wire 1244 and the first protective film 126 and / or the second protective film 127 is sufficiently large, thereby reducing the probability of the connecting wire 1244 damaging the battery cell 300 and improving the reliability of the battery.

[0120] In some embodiments, as shown in FIG. 21 , the signal acquisition device 124 is connected to the acquisition element 121 via a connecting line 1244 . Part of the connecting line 1244 is fixed between the first protective film 126 and the second protective film 127 , simplifying wiring.

[0121] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A cover plate assembly (100) mounted on a housing (200), wherein a battery cell (300) is mounted in the housing (200), wherein the cover plate assembly (100) include: A cover plate (110) is mounted on the housing (200), and a first mounting hole (111) communicating with the receiving cavity (210) is provided on the cover plate (110); A monitoring component (120), comprising a collecting component (121), a connecting component (122) and a fixing component (123); The collecting member (121) is used to obtain parameter information in the shell (200); the fixing member (123) is installed on the cover plate (110); the fixing member (123) is provided with a second mounting hole (1231) connected to the first mounting hole (111); one end of the connecting member (122) passes through the first mounting hole (111) and the second mounting hole (1231) and is electrically connected to the collecting member (121); and the other end of the connecting member (122) is exposed to the second mounting hole (1231).

2. The cover plate assembly (100) according to claim 1, in, The connecting member (122) comprises: A base portion (1221) located in the second mounting hole (1231); A first connecting portion (1222) connected to an end of the base portion (1221) facing away from the battery core (300) and exposed to the second mounting hole (1231); The second connecting portion (1223) is connected to the other end of the base portion (1221) close to the battery core (300) and extends into the first mounting hole (111), and is used to electrically connect the collecting member (121) and the first connecting portion (1222).

3. The cover plate assembly (100) according to claim 2, in, The outer side of the base portion (1221) is provided with a first protrusion (1224), and the connecting member (122) includes a first sealing member (1225). The first sealing member (1225) is sleeved on the outer side of the base portion (1221) and connected between the first protrusion (1224) and the fixing member (123).

4. The cover plate assembly (100) according to claim 3, in, The fixing member (123) comprises: A first fixing portion (1232) is arranged around the base portion (1221), is located on a side of the first protrusion (1224) away from the battery core (300), and is provided with the second mounting hole (1231); A second fixing portion (1233) is disposed around the base portion (1221) and connected to the cover plate (110); and a transition portion (1234) connected between the outer periphery of the first fixing portion (1232) and the inner periphery of the second fixing portion (1233), and provided with a through hole communicating with the second mounting hole (1231); Wherein, the first sealing member (1225) fills the through hole and is laid on the outer side surfaces of the first fixing portion (1232), the second fixing portion (1233) and the transition portion (1234).

5. The cover plate assembly (100) according to claim 4, in, The cover plate (110) is provided with a second sunken portion (112), the second sunken portion (112) being arranged around the periphery of the first mounting hole (111), and the second fixing portion (1233) being located inside the second sunken portion (112) and being welded to the cover plate (110).

6. The cover plate assembly (100) according to any one of claims 1 to 5, in, The connecting piece (122) and the fixing piece (123) are integrally injection-molded.

7. The cover plate assembly (100) according to claim 1, in, The connecting member (122) comprises a plurality of mutually insulated sub-connecting members (122); the cover plate (110) is provided with a plurality of first mounting holes (111) corresponding to the plurality of sub-connecting members (122); the fixing member (123) is provided with a plurality of second mounting holes (1231) corresponding to the plurality of sub-connecting members (122); one end of each sub-connecting member (122) away from the collecting member (121) is exposed to the corresponding second mounting hole (1231); and the other end of each sub-connecting member (122) extends into the corresponding first mounting hole (111) to be electrically connected to the collecting member (121).

8. The cover plate assembly (100) according to claim 7, further comprising: include: a second sealing member (113), the second sealing member (113) being mounted on the plurality of second mounting holes (1231), the second sealing member (113) being located between the fixing member (123) and the plurality of sub-connecting members (122), and being provided with a plurality of first openings (114); and a third sealing member (117), wherein the second sealing member (113) is installed on the plurality of the first installation holes (111), and the second sealing member (113) is located between the plurality of the sub-connecting members (122) and the cover plate (110), and is provided with a plurality of second openings (116); Wherein, one end of each sub-connector (122) is exposed to the corresponding first opening (114), and the other end of the sub-connector (122) extends into the corresponding second opening (116) to be electrically connected to the collecting member (121).

9. The cover plate assembly (100) according to claim 8, in, A second protrusion (1227) is provided on the outer side of the sub-connector (122), and the second protrusion (1227) is located between the second sealing member (113) and the third sealing member (117).

10. The cover plate assembly (100) according to any one of claims 7 to 9, in, The sub-connector (122) is a metal plug-in.

11. The cover plate assembly (100) according to claim 1, in, The diameter of the first mounting hole (111) gradually decreases in a direction from the cover plate (110) to the collecting member (121); the cover plate assembly (100) further comprises a fourth sealing member (118) located in the first mounting hole (111); the fourth sealing member (118) is provided with a third mounting hole (119); the connecting member (122) passes through the third mounting hole (119); and the fixing member (123) is covered on the fourth sealing member (118).

12. The cover plate assembly (100) according to claim 11, further comprising a lower plastic (130), wherein the lower plastic (130) is provided with a fourth mounting hole (131), a first sinking portion (132) is provided on the hole wall of the fourth mounting hole (131), a portion of the cover plate (110) is snap-fitted into the first sinking portion (132), and the connecting member (122) passes through the fourth mounting hole (131) to be electrically connected to the collecting member (121).

13. The cover plate assembly (100) according to claim 11 or 12, in, The connecting member (122) is a circuit board.

14. The cover plate assembly (100) according to any one of claims 1 to 13, in, The monitoring component (120) further comprises a signal acquisition device (124), wherein the signal acquisition device (124) is arranged on a side of the cover plate (110) close to the acquisition component (121), and the signal acquisition device (124) connects the acquisition component (121) and the connecting component (122).

15. The cover plate assembly (100) according to claim 14, in, The monitoring component (120) further comprises a wireless transmission module (125), wherein the wireless transmission module (125) is connected to the signal acquisition device (124), and the wireless transmission module (125) is configured to be wirelessly connected to an external battery control system.

16. The cover plate assembly (100) according to claim 15, in, The wireless transmission module (125) is located on a side of the connecting member (122) close to the second mounting hole (1231), and the connecting member (122) connects the wireless transmission module (125) and the signal collection device (124).

17. The cover plate assembly (100) according to claim 14, in, The signal acquisition device (124) comprises: The main body (1241) is provided with a receiving space (1242); A data processor (1243) is disposed in the receiving space (1242), and the data processor (1243) is connected to the collecting component (121) via a connecting line (1).

18. The cover plate assembly (100) according to claim 17, in, The signal acquisition device (124) further includes: A power supply (1245) is disposed in the receiving space (1242), and the power supply (1245) is electrically connected to the data processor (1243); And / or, the receiving space (1242) is filled with sealant.

19. The cover plate assembly (100) according to claim 17, in, The signal acquisition device (124) further comprises an air pressure sensor (1246), wherein the air pressure sensor (1246) is arranged in the receiving space (1242), the air pressure sensor (1246) is connected to the data processor (1243), and the air pressure sensor (1246) is configured to obtain the air pressure value in the shell (200).

20. The cover plate assembly (100) according to claim 19, in, The main body (1241) is provided with a vent hole (1247) and a breathable membrane (1248); the vent hole (1247) is located on a side of the main body (1241) close to the explosion-proof valve 170 of the battery; the breathable membrane (1248) blocks the vent hole (1247); and the air pressure sensor (1246) is arranged opposite to the vent hole (1247).

21. The cover plate assembly (100) according to claim 17, in, The main body (1241) is provided with a snap-fitting piece, the cover plate (110) is provided with a snap-fitting piece, and the snap-fitting piece is snap-fitted with the snap-fitting piece; Alternatively, the body (1241) is a plastic body (1241), and the plastic body (1241) and the cover plate (110) are fixedly connected at the fitting position by hot melting.

22. The cover plate assembly (100) according to claim 14, in, The cover plate assembly (100) further comprises: A pole (140) mounted on the cover plate (110); A connecting piece (150) is arranged on a side of the cover plate (110) facing the battery cell (300); the connecting piece (150) is configured to connect the pole (140) and the pole ear of the battery cell (300); a notch (151) is provided on a side of the connecting piece (150) close to the signal acquisition device (124); and a portion of the signal acquisition device (124) is located in the notch (151).

23. The cover plate assembly (100) according to claim 22, in, The notch (151) is in a flared shape, and the opening size of one end of the notch (151) close to the signal collection device (124) is larger than the opening size of the other end.

24. The cover plate assembly (100) according to claim 22, in, The inclination angle of the side wall of the notch (151) on the connecting piece (150) is a, wherein 3°≤a≤30°.

25. A battery, comprising a shell (200), a battery cell (300), and the cover assembly (100) according to any one of claims 1 to 24, wherein the shell (200) has a receiving cavity (210), and the battery cell (300) is installed in the receiving cavity (210).

26. The battery according to claim 25, in, The collecting member (121) is attached to the battery core (300).

27. The battery according to claim 25, in, The monitoring component (120) further comprises a first protective film (126), the first protective film (126) being in contact with a side surface of the battery cell (300), and the collecting member (121) being fixed to a side of the first protective film (126) facing away from the battery cell (300).

28. The battery according to claim 27, in, The collection component (121) comprises at least one of a temperature collection component (1211), a stress collection component (1212) and a gas composition collection component (1213).

29. The battery according to claim 27, in, The collecting member (121) is arranged in a region close to the middle of the first protective film (126).

30. The battery according to claim 27, in, The collection component (121) comprises a temperature collection component (1211), a stress collection component (1212) and a gas composition collection component (1213); along the width direction of the first protective film (126), the temperature collection component (1211) and the stress collection component (1212) are arranged at intervals; along the length direction of the first protective film (126), the temperature collection component (1211) or the stress collection component (1212) and the gas composition collection component (1213) are arranged at intervals.

31. The battery according to claim 27, in, The monitoring component (120) further comprises a second protective film (127), the second protective film (127) being in contact with a side of the first protective film (126) facing away from the battery cell (300), and the collecting member (121) being arranged between the first protective film (126) and the second protective film (127).

32. The battery according to claim 31, in, The collecting piece (121) comprises a gas component collecting piece (1213); the second protective film (127) is provided with a hollow area (1271); and a collecting end of the gas component collecting piece (1213) is located in the hollow area (1271).

33. The battery according to claim 31, in, The first protective film (126) or the second protective film (127) comprises a polypropylene material film layer or a polyimide material film layer.

34. The battery according to claim 31, It is characterized in that The length dimension of the first protective film (126) is the same as the length dimension of the second protective film (127); And / or, the width dimension of the first protective film (126) is the same as the width dimension of the second protective film (127); And / or, the thickness of the first protective film (126) is the same as the thickness of the second protective film (127).

35. The battery according to claim 31, in, The length dimension of the first protective film (126) and / or the length dimension of the second protective film (127) is less than or equal to the length dimension of the battery cell (300), and the width dimension of the first protective film (126) and / or the width dimension of the second protective film (127) is less than or equal to the width dimension of the battery cell (300).

36. The battery according to claim 31, in, The sum of the thicknesses of the first protective film (126) and the second protective film (127) is D, wherein 0.1 mm≤D≤2.0 mm.

37. The battery according to claim 31, in, The distance between the wide side of the first protective film (126) or the second protective film (127) and the wide side of the battery cell (300) is W, and the distance between the long side of the first protective film (126) or the second protective film (127) and the long side of the battery cell (300) is L, wherein 3.0 mm ≤ W ≤ 30.0 mm, and 3.0 mm ≤ L ≤ 30.0 mm.

38. The battery according to claim 37, in, L=W.

39. The battery according to claim 31, in, The first protective film (126) and / or the second protective film (127) has a first end and a second end, the first end is close to the top of the battery cell (300), the second end is close to the bottom of the battery cell (300), and the distance between the first end and the top of the battery cell (300) is smaller than the distance between the second end and the bottom of the battery cell (300).

40. The battery according to claim 31, in, The signal acquisition device (124) is connected to the acquisition element (121) via a connecting line (1), and at least a portion of the connecting line (1) is arranged between the first protective film (126) and the second protective film (127).

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